No markings whatsoever, did peruse the G503 forum which goes into a lot of detail about these so called mystery cans, most likely early American. I'm going to keep it, have got most of the tar off, by blowtorch and finishing of with Nitromors, a wash off with diesel and then petrol, didn't look too bad. Now sent off to sandblasters to clean rust off. Also sent a 1943 Ameri can, with solid sides but the bottom was rusted out, will weld a new bottom piece in, shouldn't look too bad, managed to save the bottom piece with the ICC markings on, so i'll make that part of the new infill piece.
The Ameri can.
The original bottom, rusted out.
A view inside after I cut out the rusty bottom. Still signs of the original red oxide, or would it have been red lead?
Simon